Unbalanced force generation in motors

Details Unbalanced force generation in motors Unbalanced force generation in motors

1996-12-13

1999-09-07

LaBalle, Clayton

Electrical generator or motor structure

Dynamoelectric

Rotary

318623, H02K 524

Patent

active

059491620

ABSTRACT:
In many uses of electrical motors, the interaction of a tool being powered, e.g., a milling machine, and the workpiece being worked on by the motor induces mechanical vibrations which adversely affect the functioning of the tool as well as inducing wear producing vibrations in the motor rotor shaft. Damping of such vibrations is achieved by deliberately inducing internal unbalanced forces on the motor rotor shaft for counteracting the externally induced vibrations. Such internal unbalanced forces are produced by the use of additional currents in the main stator coils for generating additional, unbalanced force generating magnetic fields. A mathematical analysis of the process is provided.

REFERENCES:
patent: 2777105 (1957-01-01), Larsen
patent: 2849671 (1958-08-01), Stefan
patent: 4219767 (1980-08-01), Wimmer
patent: 5202824 (1993-04-01), Chen
patent: 5424595 (1995-06-01), Preston et al.
patent: 5627440 (1997-05-01), Yamamoto et al.
patent: 5636193 (1997-06-01), Ohmi

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